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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46647a179c7de9f5e5c34b553e2df4256072b7c551efc9a394c218ac044d41a8' 
  AND token = 'Kd4Au8ePzFG01Lq4EE6o96vqiuNxOc3ue1r16as3nHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}